This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A126955 #10 Oct 30 2019 17:30:09
%S A126955 1,5,65,89,119,215,455,755,779,965,1175,1349,1409,1469,1679,1745,1769,
%T A126955 1889,1955,2009,2105,2435,2519,2525,2585,2639,4685,5045,5165,5735,
%U A126955 5915,5969,6725,7415,7469,7895,8045,9065,9365,9449,9659,9779,9959,10379
%N A126955 Numbers n such that 2n+1, 3n+2 and 4n+3 are primes.
%H A126955 Harvey P. Dale, <a href="/A126955/b126955.txt">Table of n, a(n) for n = 1..1000</a>
%e A126955 Take n = 89. Then 2*89 + 1 = 179, 3*89 + 2 = 269 and 4*89 + 3 = 359 are primes.
%t A126955 Select[Range[10500], PrimeQ[2# + 1] && PrimeQ[3# + 2] && PrimeQ[4# + 3] &] (* _Ray Chandler_, Mar 20 2007 *)
%t A126955 Select[Range[11000],AllTrue[{2#+1,3#+2,4#+3},PrimeQ]&] (* The program uses the AllTrue function from Mathematica version 10 *) (* _Harvey P. Dale_, Jan 23 2017 *)
%Y A126955 Intersection of A005097, A024893, A095278. Cf. A126956.
%K A126955 nonn
%O A126955 1,2
%A A126955 _J. M. Bergot_, Mar 19 2007
%E A126955 Extended by _Ray Chandler_, _Robert G. Wilson v_ and _Stuart Clary_, Mar 20 2007